Automatic spray head



Patented Dec. 27,- 1932 I UNITED STATES PATENT OFFICE CLAUD H. BILLS, OF LA. HAIBRA, AND GLENN G. GRISWOLD, OF PICO, 'CALIFGRNIA AUTOMATIC SPRAY HEAD Application filed August 26, 1930. Serial No. 477,844.

This invention relates to an automatic spray head which is placed in structures that entail a fire hazard, and the prime object of our invention isfto provide a novel automatic spray head which will release a fine spray of liquid over, in, or around a structure when the temperature in the head reaches a predetermined point.

Another object of' our invention is to provide a novel automatic spray head which is simple in construction, and which can be quickly and easily assembled.

A further object is to provide a spray head of the character stated in which the passage to the outlet ducts is unrestricted.

Other objects, advantages, and features of invention may appear from the accompanying drawing, the subjoined detailed description, and the appended claims.

In the drawing Figure 1 is a side elevation of our spray head.

Figure 2 is a longitudinal, sectional view of the same.

Referring more particularly to the drawing, the numeral 1 indicates the body of our spray head, and this body is threaded at the lower end thereof to receive the liquid supply pipe 2. The body 1 flares outwardly as ring 'or flange 4. The body is again reduced in diameter above the flange 4 as shown at 5, and the upper end is threaded as at 6 to J receive a cap 7. The cap screws tightly upon the thread 6 and seats on the top of the body 1 so that there is 'no leakage between the body and the cap.

A valve seat 8 is formed in the body 1 above the end of the pipe 2, and a valve 9 rests on said seat. A stem 10 rises from the valve 9 and extends through the cap 7 When the valve 9 is held tightly upon its seat, no liquid can enter the body 1, as will be further described.

Inthe reduced portion 5 of the body 1, we provide a plurality of upwardly extending ducts 12, and a plurality of downwardly extendin ducts 1 1. forme in pairs 'so that the stream of liquid passing therethrough will meet in a plane at 3 to an annular horizontally positioned The .ducts 1112 aresubstantially central between. the two ducts, and the impact of the two streams will cause them to break into very fine particles which are extremely effective in combating fire.

In event that any of the ducts1112 should become clogged, the stream from the opposite ducts to that one which is clogged will still be broken up because said stream will strike upon flange 4 or upon the flange 13 which is formed on the bottom of the cap 7. To releasably hold the valve 9 upon its seat,

we provide the following structure: A pin 14 projects horizontally from the cap 7, and

a hold-down lever 15 is provided with a pair of hooks 16 which partly encircle the pin 14. An. arm 17 projects from the lever 15, and a fusible link 18 has holes in either end thereof so as to receive the arm 17, and a lug 19 which projects from the cap 7.

A bolt 20 screws through the lever 15 against the top of the stem 10, thus securely holding the valve 9 upon its seat. When the temperature increases above a certain allowable limit, the' fusible linkl8 will melt and the pressure of the water in the pipe 2 will force the valve 9 upwardly off of its seat. The valve will be pushed upwardly until it engages the cap 7 and inthis position the valvewill be entirely out of the way of the flow of water passing into. the body and out of the ducts 11-12.

. When the fusible link 18 melts, the lever 15 will be swung back above the pin 14, and

will drop out of the way.

Having described our invention, we claim: 8 1. A spray head comprising a body having a ring shaped groove in its outer surface, said body having a plurality of oppositely disposed converging outlet ducts formed in opposite sides of said groove, a cap on the top r 2 I 1,ae1,eoe

opposite sides of said groove, a cap screwed on to the top of the body, a flan e on the body adjacent the ducts on one si e ofsaid groove, and a flange on the lower end of said 5 cap adjacent the ducts on the other side of said groove, each of said flanges being formed so as to be in line with the ducts opposite thereto, a valve seated in said body; a stem. risingfrom the valve, said stem extending, through the cap, means engaging said stem,'and a fusible link coupled to said means. g In testimony whereof, we aflix our signa- CLAUD H. BILLS.

. tures.

' GLENN G. GRISWOLD. 

